The purpose of this study is to determine efficacy of the combination therapy of pemetrexed and carboplatin as treatment for patients with platinum-sensitive ovarian cancer. This study also includes patients with primary peritoneal cancer.

MTD was to be determined by increasing doses of pemetrexed up to 900 mg/m^2 and carboplatin Area Under the Concentration-Time Curve (AUC) up to 6 mg/mL*min based on observed pattern of dose limiting toxicity (DLT). See Outcome #3 for DLT. If none of 3 initial participants at a given level experienced a DLT in Cycle 1, enrollment proceeded to the next dose level. If at least 2 participants experienced a DLT in Cycle 1 at a dose level, that dose level was considered the MTD. However, based on results from a different Phase 2 Study (NCT00109096), further dose escalations were not explored.

MTD was to be used as Phase 2 recommended dose. MTD was to be determined by increasing doses of pemetrexed up to 900 mg/m^2 based on observed pattern of dose limiting toxicity (DLT: See Outcome #3). If none of 3 initial participants at a given level had a DLT in Cycle 1, enrollment proceeded to next dose level. If at least 2 participants had a DLT in Cycle 1 at a dose level, that dose level was considered the MTD. However, based on results from another Phase 2 Study (NCT00109096), further dose escalations were not explored and dose was selected based on results of that Phase 2 Study.

MTD was to be used as Phase 2 recommended dose. MTD determined by increasing doses up to AUC 6 mg/mL*min based on pattern of DLT (Outcome #3). If none of 3 initial participants at given level had DLT in Cycle 1, enrollment proceeded to next dose level. If at least 2 participants had DLT in Cycle 1 at dose level, that dose level was considered MTD. However, based on results from Phase 2 Study (NCT00109096), further dose escalations were not explored: carboplatin dose was selected based on standard dose employed in control arm of first-line therapy for epithelial ovarian cancer (Bookman 2006).

Duration of response is defined as the time from first observation of Complete Response or Partial Response to the first observation of Progressive Disease or death from any cause. For patients who are still alive at the time of analysis, and who do not have Progressive Disease, duration of response will be censored at the date of the last objective progression-free disease assessment.

Time to objective progressive disease (TTPD) is defined as the time from the date of study enrollment to the date of objectively determined Progressive Disease (PD). For patients who die without objective PD (including death from study disease), TTPD will be censored at the date of the last objective progression-free disease assessment. For patients who are still alive at the time of analysis, and who do not have PD, TTPD will be censored at the date of the last objective progression-free disease assessment.

Phase 2 - Time to Treatment Failure [ Time Frame: First treatment to discontinuation of study drug, progressive disease, or death (up to 31 months) ] [ Designated as safety issue: No ]

Time to treatment failure (TTTF) is defined as the time from the date of study enrollment to the date of the first observation of disease progression, death from any cause, or early discontinuation of treatment (any reason). For patients who are alive, progression-free, and have not discontinued early at the time of analysis, TTTF will be censored at the date of the last objective progression-free disease assessment.

Phase 2 - Overall Survival [ Time Frame: baseline to date of death from any cause (up to 31 months) ] [ Designated as safety issue: No ]

Overall survival is defined as the time from the date of study enrollment to the date of death from any cause. This analysis was not done due to the high number of censored patients.

Phase 2 - Number of Participants With Adverse Events (Toxicity) [ Time Frame: baseline through end of Phase 2 (up to 31 months) ] [ Designated as safety issue: No ]

A listing of adverse events is located in the Reported Adverse Event module.

Progression-free survival (PFS) is defined as the time from the date of study enrollment to the date of objectively determined PD or death from any cause, whichever comes first. For patients who are still alive at the time of analysis, and who do not have PD, PFS will be censored at the date of the last objective progression-free disease assessment.

Diagnosis of ovarian or primary peritoneal cancer confirmed by pathology

Patients must have recurrent ovarian cancer which is sensitive to platinum therapy

Prior radiation therapy is allowed

Measurable disease as defined by the Response Evaluation Criteria In Solid Tumors (RECIST) guidelines, or non-measurable but cancer antigen 125 (CA-125) greater than or equal to 2X upper limit.

Exclusion Criteria:

More than 2 lines of therapy for ovarian or primary peritoneal cancer.

Pregnant or breast feeding.

Have received treatment within the last 30 days with a drug that has not received regulatory approval for any indication at the time of study entry.

Contacts and Locations

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Please refer to this study by its ClinicalTrials.gov identifier: NCT00489359